SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 103. NUMBER 7 



THE MUSCULATURE OF THE LABRUM, 



LABIUM, AND PHARYNGEAL REGION 



OF ADULT AND IMMATURE 



COLEOPTERA 



(With 24 Plates) 



BY 

 CARL KESTER DORSEY 



Bureau of Entomology and Plant Quarantine 

 U. S. Department of Agriculture 



(Publication 3697) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JANUARY 20, 1943 



